The Synology DS923+ is 4-bay, AMD Ryzen R1600, 4GB DDR4 ECC (2 SO-DIMM, max 32GB), 2× M.2 2280 NVMe cache. Best mid-range NAS.
This guide covers everything you need to know about upgrading RAM, adding NVMe cache, and storage expansion.
Specifications
| Component | Specification |
|---|---|
| Model | N/A |
| Processor | AMD Ryzen R1600 (Dual-core, 2.6GHz) |
| RAM Type | DDR4 ECC SO-DIMM |
| RAM Slots | 2 × SO-DIMM |
| Default RAM | 4GB |
| Maximum RAM | 32GB |
| Storage Bays | 4 bays |
| NVMe Cache Slots | 2 × M.2 2280 |
| Connectivity | 2× GbE RJ-45, 1× USB 3.2 |
| Form Factor | Desktop |
Memory Upgrade Path
The NAS ships with 4GB of DDR4 ECC SO-DIMM RAM installed across 2 SO-DIMM slots.
You can upgrade to a maximum of 32GB by installing compatible DDR4 ECC SO-DIMM modules. ECC (Error Correcting Code) memory is required for this model to maintain data integrity on NAS devices.
Recommended compatible RAM modules:
- Kingston Server Premier KSM32SED8/16ME (16GB)
- Samsung M391A2K43BB1-CTD (16GB)
- Kingston ValueRAM KVR32SE22S6/8 (8GB ECC)
Mixing RAM sizes is supported — for example, you can pair your stock module with a larger upgrade module.
However, for best performance, identical matched pairs are recommended.
NVMe SSD Cache
This NAS features 2 M.2 M.2 2280 NVMe slots for SSD caching, which dramatically improves performance for frequently accessed data.
What does NVMe cache do? NVMe caching creates a high-speed buffer between your disk drives and the system,
allowing rapid access to frequently used files without spinning up the mechanical disks. This reduces latency and improves responsiveness.
Recommended NVMe SSDs for this model:
- WD Red SN700 (1TB, 2TB) – NAS optimized
- Seagate IronWolf 525 (1TB, 2TB) – NAS grade
- Samsung 980 Pro (500GB, 1TB) – High performance
- Crucial P5 Plus (500GB, 1TB) – Budget option
Most NAS manufacturers recommend using enterprise-grade NVMe drives (WD Red SN, Seagate IronWolf 525) rather than consumer drives for reliability.
Storage Drive Recommendations
Always use NAS-specific hard drives rather than standard desktop drives. NAS drives are optimized for 24/7 operation and include RAID-ready firmware.
Recommended NAS hard drives:
- WD Red Plus (2TB, 4TB, 8TB, 12TB) – Standard NAS drive
- Seagate IronWolf (2TB, 4TB, 8TB, 12TB) – NAS optimized
- WD Red Pro (4TB, 8TB, 12TB) – Enterprise NAS
- Seagate IronWolf Pro (4TB, 8TB, 12TB) – High reliability
For multi-bay systems, consistent drive capacity and speed is recommended. Mixing old and new drives can cause performance bottlenecks.
Upgrade Difficulty & Tools Required
Difficulty Level: Very Easy (5-10 minutes)
Most NAS RAM upgrades are simple and require minimal tools:
- Anti-static wrist strap (optional but recommended)
- Phillips head screwdriver (for access panel only)
- Your new RAM module
Simply power off your NAS, locate the RAM slot(s) inside the unit, align the new module at 45 degrees, and gently press down until the retention clips lock into place.
Full step-by-step instructions are included in your unit’s manual.
Frequently Asked Questions
Can I mix different RAM sizes in my Synology DS923+?
Yes, you can mix RAM sizes (for example, 2GB + 8GB). However, mixing creates slight performance asymmetry.
For optimal performance, use identical capacity and speed modules in matched pairs where possible.
Do I need ECC RAM?
Whether ECC is required depends on your model. Check your specifications above.
AMD Ryzen-based NAS models (like the DS923+, TS-873A) require ECC-rated memory for stability and RAID reliability.
Non-ECC models (Celeron-based) can technically use either, but ECC is always safer for 24/7 NAS operation.
What does NVMe cache do in a NAS?
NVMe cache sits between your disk array and the system processor, providing ultra-fast temporary storage.
This reduces latency when accessing frequently used files and can improve performance by 5-10x in typical workloads.
It’s especially useful for small file operations, databases, and virtualization.
Is my NAS RAM upgradeable?
Most Synology NAS models use standard SO-DIMM slots that are user-upgradeable. However, some entry-level models
(like the ASUSTOR AS3304T) have soldered RAM and cannot be upgraded. Always check your model specifications before purchasing.
How do I upgrade RAM in my NAS?
Most NAS RAM upgrades are straightforward: power off the unit, open the access panel, and gently insert the SO-DIMM module at a 45-degree angle
until the retention clips snap into place. Consult your unit’s manual for specific instructions — RAM installation is usually faster than a hard drive swap.
Will upgrading NAS RAM void my warranty?
Most manufacturers (Synology, QNAP, ASUSTOR, TerraMaster) explicitly allow user RAM upgrades without voiding warranty.
However, always verify with your specific unit’s documentation or contact support before opening your device.
Recommended Products
Here are the best-matched memory, storage, and accessory upgrades for your Synology DS923+:
| Product Category | Recommended Product | Amazon UK |
|---|---|---|
| RAM Upgrade | Kingston ValueRAM DDR4 SO-DIMM 8GB/16GB | View on Amazon UK |
| NVMe Cache | WD Red SN700 1TB NAS NVMe | View on Amazon UK |
| NAS Storage | WD Red Plus 4TB/8TB NAS Drive | View on Amazon UK |
| External Storage | Seagate IronWolf 4TB/8TB HDD | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
